EP2535600A1 - Proportional valve - Google Patents

Abstract

The directional valve has one- or two-piece housing (1), which has two load connections, a tank connection and a pressure connection. A pair of two-positional-valve-insert, particularly a two-by-two seat valve insert and a three-by-two seat valve insert, is provided for four-way or four-positional valve function. The pair of two-positional-valve-insert is operated by magnets (5). The magnets are connected together. The load connections are connected at recess boreholes provided with the three-by-two seat valve insert.

Description

The invention relates to a directional control valve according to the preamble of patent claim 1.

In the out EP 1 853 839 A known directional valve four identical 2/2-way seat valve inserts are arranged in a housing for a 4/3-way valve function, wherein the mounting holes are matched to each other equal and each to the dimensioning of a 2/2-seat valve insert. One pair of 2/2 valve inserts each is operated simultaneously by one of two magnets. In order to achieve a 4/2-way function or a 3/3-way function with the same housing, the equipment of the housing can be changed with a kit of 2/2-seat valve inserts, blind sockets or closing plates, so that, for example, for a 4 / 2-way function only two 2/2-seat valve inserts and two blind sockets and / or closing plates and for a 3/3-way function only two 2/2-seat valve inserts and two dummy sockets and / or closing plates and optionally only one magnet are mounted. With the kit, however, a maximum of 4/3-way valve function can be achieved.

Out EP 1 564 465 A is a directional control valve with a 4/2-way function known in the housing in two identical mounting holes two identical 3/2-way seat valve inserts are mounted, which are actuated jointly by a magnet.

At the EP 0 527 393 A known directional valve, two housings are each connected in parallel hydraulically with a magnet. In each case, two 2/2-way poppet valves are mounted in two identical mounting holes, which are operated together by the magnet. Each housing has two consumer connections, a pressure connection and a tank connection.

The invention has for its object to provide a directional control valve of the type mentioned above, which allows structurally simple way a higher-level multi-way multi-valve function.

The stated object is achieved with the features of claim 1.

By the combination of two pairs each of a 2/2-way seat valve insert and a 3/2-way seat valve insert, which are actuated in pairs together by a magnet, and by the interconnection of the two magnets, so that these either individually or together can be energized, with structurally little effort in a housing a Achieve 4/4-way valve function. With the same housing, as known per se, other multi-way multi-position valve functions can be achieved by changing the assembly.

The housing is expediently one-piece, but could also be made of two interconnected, at least substantially identical housing parts, between which the required for the four-way four-position valve function flow paths are connected accordingly.

In an expedient embodiment, the consumer ports are connected to the receiving bores containing the 3/2-seat valve inserts, wherein the respective 3/2-seat valve insert is actuated by one of the two magnets.

In an expedient embodiment, when the magnets are energized together, both consumer connections are connected to one another and together with the pressure connection and blocked together to the tank connection. In this way, in the case of jointly energized magnets, it is possible to set a hydraulic blockage between the consumer connections or, if appropriate, a common pressurization of the consumer connections without the possibility of venting to the tank.

In an alternative, likewise very expedient embodiment, when the magnets are jointly energized, both consumer connections are connected to one another and together with the tank connection and are jointly blocked to the pressure connection. In this case, the two consumer connections are switched into a floating position, so to speak, if they belong to a common consumer, or two consumers are relieved via the directional control valve to the tank at the same time.

In the embodiment, which connects both consumer ports together and together with the pressure port in jointly energized magnet, it is useful if the pressure port is connected via a flow path in the housing together with the 3/2-seat valve inserts containing receiving bores, and the tank port via a another flow path in the housing is connected to the 2/2 seat valve inserts containing receiving bores, and containing the operable by a magnet 2/2-seat valve insert receiving bore via other flow paths in the housing with the actuated by the other magnet, the 3/2 -Sitzventileinsatz containing receiving bore is connected. As a result, the 4/4-way function results from the fact that the load connections and the tank connection as well as the pressure connection are blocked when the solenoid is de-energized connected to the pressure port and shut off from the tank port and the other consumer connected to the tank port and shut off from the pressure port, when energizing the other magnet, the other load port connected to the pressure port and blocked from the tank port, however, connected a consumer port to the tank port and shut off from the pressure port is, and finally, with simultaneous energization of the two magnets both consumer connections are connected to the pressure port and shut off from the tank connection.

The aforementioned 4/4-way valve function can be suitably modified if the pressure and tank connections are each designed to selectively connect a pressure or a tank line, so that the pressure connection and the tank connection exchange their functional positions at the directional control valve. This results in jointly energized magnet connecting both consumer connections to the tank connection, and the separation of both consumer connections from the pressure port, as well as the isolation of the pressure port.

The use of the seat valve inserts leads to the important in many hydraulic circuits advantage that at least in the de-energized state of both magnets, the consumer ports, the pressure port and the tank port are each sealed leak-free, and in other switch positions at least one respectively unnecessary connection is shut off leak-free.

In a further expedient embodiment, each energized magnet commonly actuates the pair of 2/2 and 3/2 seat valve cartridges having actuating tappets together via a tappet or plunger bar. This results in a considerable structural simplification of the directional control valve.

In a further expedient embodiment, the housing or each of the housing parts is made of steel and machined. This selection of materials means that the directional control valve can be used even with a compact housing up to extreme working pressures, for example up to working pressures of 500 bar or more.

Finally, it is provided in a structurally simple and compact embodiment, that the housing is cuboidal and are each placed two receiving holes in two opposite Magnetmontierseiten the cuboid, namely offset diagonally in cross-section of the cuboid and on the two Magnetmontierseiten each other. In this way, with compact dimensions of the housing, the volume of the cuboid make optimal use of, between the pressurized flow paths and receiving holes enough meat is available.

Fig. 1

eine Seitenansicht eines erfindungsgemäßen Wegeventils,

Fig. 2

eine Stirnansicht zu Fig. 1,

Fig. 3

einen Teilschnitt des bestückten Gehäuses des Wegeventils,

Fig. 4

ein Blockschaltbild der 4/4-Wegeventilfunktion des Wegeventils in vereinfachter Symbolik,

Fig. 5

ein Blockschaltbild zu Fig. 4 in aufgelöster Symbolik,

Fig. 6

ein Blockschaltbild einer anderen Ausführungsform der 4/4-Wegeventilfunktion in vereinfachter Symbolik, und

Fig. 7

das Blockschaltbild von Fig. 6 in aufgelöster Symbolik.

With reference to the drawings, embodiments of the subject invention will be explained. Show it:

Fig. 1

a side view of a directional control valve according to the invention,

Fig. 2

an end view too Fig. 1 .

Fig. 3

a partial section of the equipped housing of the directional control valve,

Fig. 4

a block diagram of the 4/4-way valve function of the directional valve in simplified symbolism,

Fig. 5

a block diagram to Fig. 4 in dissolved symbolism,

Fig. 6

a block diagram of another embodiment of the 4/4-way valve function in simplified symbolism, and

Fig. 7

the block diagram of Fig. 6 in dissolved symbolism.

One in the Fig. 1 and 2 in two views shown directional control valve W is used, for example, to provide a 4/4-way valve function. The directional control valve W has a housing 1 (block-shaped steel block, machined), two magnets 4, 5 (for example, black-and-white switching magnets) mounted on opposite magnet mounting sides 2, 3 of the housing 1, and terminals disposed on the housing, namely two load ports A, B, a pressure port P and a tank port T.

In Fig. 2 is in the front view a diagonal plane 6 of the housing 1 indicated in the basis of Fig. 3 (Section III - III in Fig. 2 ) explained, the magnet mounting side 2 open mounting holes 13, 14 are placed.

According to Fig. 3 (Section of a half of the housing 1) is formed on the Magnetmontierseite 2 of the housing 1, for example, a central receiving bore 7 for a ring insert 8, to which the magnet 5 is attached, of which an anchor tappet 9 extends to a ram plate 10 or ram beam, the two spaced, mutually parallel actuating tappet 11, 12 is able to operate together.

Starting from the receiving bore 7, the two separate receiving bores 13, 14 (stepped bores) extend at each magnet mounting side 2, 3 into the housing 1, so that the housing has a total of four mounting bores 13, 14. Each receiving bore 13, 14 leads to a reduced diameter end portion 29 and 30, in which a port 16, 24 of a housing 1 in the example drilled flow path (in Fig. 3 generally indicated at 28).

In the embodiment shown is in Fig. 3 in the receiving bore 13, a 2/2-seat valve insert S1 mounted while in the receiving bore 14, a 3/2-seat valve insert S2 is mounted. The 2/2-seat valve insert has a connection 15 to a not further highlighted flow path in the housing 1, and a valve seat 17 which cooperates with an axially adjustable valve cone 18, which is acted upon by a spring 19 in the closing direction. In the in Fig. 3 shown position is blocked 16 leakage-free under the force of the spring 19, the terminal 16 of the terminal 15. The magnet 5 is not energized. If, however, the magnet 5 is energized, then the valve stem 18 is raised against the force of the spring 19 from the valve seat 17 via the actuating plunger 11, so that the terminals 15, 16 are connected to one another.

The mounted in the respective receiving bore 14 3/2-seat valve insert S2 has two terminals 21, 20, which are separated by a valve seat 22, wherein the terminal 21 via a further valve seat 23 to the terminal 24 is connectable. Between the valve seats 22, 23 is a valve cone 25 with two (eg conical) seats by the spring 26 and the magnet 5 via the actuating plunger 12 back and forth adjustable. In the position shown in Fig. 3 is the terminal 20 separated from the terminal 21 by the force of the spring 26, while the terminal 21 is connected to the terminal 24. If the magnet is energized, then the terminal 21 is separated from the terminal 24 via the seat 23, whereas the terminal 21 is connected to the terminal 20.

The arrangement of the receiving bores 13, 14 with the mounted therein 2/2 and 3/2-seat valve inserts S1, S2 is offset at the other Magnetmontierseite by 90 °, wherein the in Fig. 3 only generally indicated flow paths 28 produce certain internal connections between the receiving bores, based on the FIGS. 5 and 7 be explained in more detail.

Assuming that the respective port 21 of each 3/2-seat valve insert S2 is connected to the pressure port P, the respective port 20 to a consumer port A or B is connected, and the respective port 21 is connected to the receiving bore 13 of the 2/2-seat valve insert S1, which is actuated by the other magnet 4 or 5, is achieved with the directional control valve, a 4/4-way valve function based on the 4 and 5 is explained in more detail.

In Fig. 4 is shown with simplified symbolism that the directional control valve W can take four switching positions, namely a switching position with de-energized magnet 4, 5 (second from the right), in which the consumer ports A, B and the pressure port P as well as the tank port T are leak-free blocked, a switching position b with energization only of the magnet 5, in which the consumer port A is connected to the tank port T, whereas the consumer port B to the pressure port P, a switching position a when energized only the magnet 4, in which the consumer port A to the pressure port P. and the consumer port B are connected to the tank port T, and finally a switching position a + b with simultaneous energization of both magnets 4, 5, in which both consumer ports A, B are connected to each other and together with the pressure port P, while both consumer ports A, B opposite the tank connection T and the tank connection T also bl are ocked.

In the resolved schematic symbol representation in Fig. 5 It can be seen that in the housing 1 from the port 21 of the 3/2-seat valve insert S2 containing receiving bore, which belongs to the magnet 4, a flow path 33 leads to the terminal 21 of the magnet 5 associated 3/2-seat valve insert S2 in the other receiving bore and this flow path 33 is connected to the pressure port P, to which, for example, a pressure line 36 is connected. The port 24 of the 3/2-seat valve insert S2 of the magnet 4 containing receiving bore is connected via a flow path 32 with the port 16 of the 2/2-seat valve insert S1 of the other magnet 5 containing receiving bore. The connection 24 in the receiving bore containing the 3/2 seat valve insert S2 of the magnet 5 is connected via a flow path 31 to the connection 16 of the receiving bore containing the 2/2 seat valve insert S1 of the magnet 4. Finally, the connections 15 of both the 2/2 seat valve inserts containing receiving bores of both magnets 4, 5 are connected to each other via a flow path 34, to which the tank port T is connected, to which, for example, a tank line 35 can be connected.

The representation in Fig. 5 is to be considered only as an example, since it is quite conceivable to connect the terminals 21, 24 and possibly 20 differently than in Fig. 5 indicated. The invention further encompasses other, simpler valve functions of the directional control valve W, for example, in that the same housing is equipped only with 2/2 seat valve inserts for achieving a 4/3 or 4/2 or 3/3 way function is modified, for example, by omitting individual 2/2-seat valve inserts and / or a magnet 4 or 5 and use of dummy jacks, cover plates or plugs in the housing. 1

Furthermore, should be mitumfasst of the invention, the receiving bores 13, 14 in each side of the housing not different form, but only the same mounting holes 14 to drill and also provide the flow paths and connections, as shown for the receiving bore 14. Then in all receiving bores 14 3/2-way seat valve inserts, as in Fig. 3 be used, for example, to achieve a 5/4-way valve function. In this case, the directional control valve W with four 3/2-seat valve inserts could fulfill the 5/4-way function, whereas if only a 4/4-way function is needed, as shown, then fitted with shorter 2/2 seat valve inserts S1 Mounting holes 14 dummy sockets are used, which fill the excess space and block certain flow paths and / or separate. Alternatively, only plugs could be introduced into well mouths. A 5/4-way function, for example, be useful if two separately pressurizable pressure connections are provided. The modular modifiability of the directional valve with blind sockets, plugs, closing plates and the like. For the optional creation of 4 / 3-, 3/3 or 4/2-way valve functions is also given.

The pressure port P and the tank port T can be designed so that the respective tank line 35 or pressure line 36 can be optionally connected to each port. For example, in the embodiment of Fig. 6, 7 given 4/4-way valve function be achieved, in which in a switching position (simultaneous energization a + b both magnets 4, 5), the two consumer ports A, B are connected to each other and together with the tank port T, while the pressure port P shut off leak-free is. The further interconnection of this embodiment corresponds to that of Fig. 3 , The four positions result from the fact that in the de-energized state of both magnets 4, 5 both consumer ports A, B are shut off leakage-free as well as the pressure port P and the tank port T, is energized b only the magnet 5 of the consumer port A connected to the pressure port P. , While the consumer port B is connected to the tank port T, when energizing a only the magnet 4 of the consumer port A to the tank port T and the consumer port B are connected to the pressure port P, and while energizing a + b both magnets 4, 5 the Load ports A, B are connected to each other and together with the tank port T, while the pressure port P leak-free is locked. This would be a kind of floating position, for example, in a double-acting hydraulic cylinder.

Incidentally, it should also be included with the invention to combine the magnets 4, 5 with manual actuators (emergency or alternative manual operation), or to replace them with only manual actuators, so that in the latter case the directional control valve is purely manually switchable, e.g. via cam controls and / or hand lever or button.

Claims (10)

Directional control valve with multi-way / multi-position function, with a one- or two-part housing (1), the two consumer connections (A, B), a tank connection (T) and a pressure connection (P) to one of four receiving bores (13, 14) for each a two-position seat valve insert (S1, S2), internal flow paths (31 to 34) between receiving bores and in each receiving bore (13, 14) contains a two-position seat valve insert (S1, S2), and on which Magnetmontierseiten (2, 3) each for mounting a magnet (4, 5) are arranged, each energized (a + b) simultaneously actuates a pair of two-position poppet valves (S1) against the spring load, characterized in that for providing a four-way / four-position valve function of the directional control valve (W) each two-position valve insert pair (S1, S2) actuatable together by a magnet (4 or 5) comprises a 2/2-seat valve insert (S1) and a 3/2-seat valve insert (S2), and the Mag Neten (4, 5) either individually or jointly energized (a; b; a + b) are interconnected. Directional valve according to claim 1, characterized in that the consumer connections (A, B) are connected to the 3/2-seat valve inserts (S2) containing receiving bores (14). Directional valve according to claim 1, characterized in that when jointly energized (a + b) magnet (4, 5) both consumer ports (A, B) connected to each other and together with the pressure port (P) and are blocked to the tank port (T). Directional control valve according to claim 1, characterized in that when jointly energized (a + b) magnet (4, 5) both consumer ports (A, B) connected to each other and together with the tank port (T) and are blocked to the pressure port (P). Directional valve according to claim 3, characterized in that the pressure port (P) via a flow path (33) in the housing (1) with the 3/2 seat valve inserts (S2) containing receiving bores (14) is connected, that the tank port (T) via a further flow path (34) in the housing (1) with which the 2/2-seat valve inserts (S1) containing receiving bores (13) is connected, and that by a magnet (4 or 5) operable 2/2-seat valve insert ( S1) containing receiving bores (13) via further flow paths (31, 32) in the housing (1) with the respective actuable by the other magnet 3/2-seat valve insert (S2) receiving bore (14) is connected. Directional valve according to claim 1 and 3 or 4, characterized in that the pressure and tank connections (P, T) are each designed for selectively interchangeable connection of a pressure or a tank line (35, 36). Directional valve according to at least one of the preceding claims, characterized in that at least in de-energized state of both magnets (4, 5) the consumer ports (A, B), the pressure port (P) and the tank port (T) are each blocked leak-free. Directional control valve according to at least one of the preceding claims, characterized in that each energized magnet (4, 5) the pair of the one actuating tappet (11, 12) having 2/2 and 3/2-seat valve inserts (S1, S2) via a Push plate or plunger bar (10) operated together. Directional control valve according to at least one of the preceding claims, characterized in that the housing (1) or each of two housing parts consists of steel and is machined. Directional control valve according to at least one of the preceding claims, characterized in that the housing (1) is cuboid, and in that two receiving bores (13, 14) in the two opposite Magnetmontierseiten (2, 3) of the cuboid and placed in pairs diagonally offset are.

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